Harrow-tooth blade



J. N. SHEFFIELD.

HARROW TOOTH BLADE.

APPLICATION FILED 0cT.29. m9.

1,378,487. Patented May 17,1921.

illmmn I INVENTOR.

#6: ATTORNEYS UNITED JULIAN SHEFFIELD, or oHArIN, vnwjong 1.

. AnRow-roorrr B lj'iADE. V f

T0 allwhomz'tmag] concern:

Be it known that I, JULIAN N. SHEFFIELD, a citizen of the United States,,and resident of Chapin, in the county of Ontario and State of New York, have invented certaln new and useful Improvements in Harrow- Tooth Blades, of which the following 1s a specification. I

The present invention relates to a harrow tooth blade of the type in which the blade 1s secured to the ordinary resilient or sprmg tooth of a harrow, an object of this invention being to provide a clamplng means by which the blade may be effectively secured to the tooth without the provision of a fastening device which passes through an openlng in the tooth. Still another object of the invention is to provide an abutment on the rear face of the blade cooperating with the free end of the tooth in order to remove the strain from the clamping means which secure the blade to the tooth.

To these and other ends, the invention.

consists of certain parts and combinations of parts, all of which will be hereinafter de; scribed, the novel featuresbemg pointed out in the appended claims.

In the drawings: 7 Figure 1 is a rear face view of the blade; Fig. 2 is a front face view of the blade; Fig. 3 is an enlarged fragmentary View of the blade showing the manner in WhlOh the blade is secured to the tooth;

Fig. 4 is a section on the line 4.4, 3; and

Fig. 5 is a central section through the blade showing the manner in which the latter connects with the tooth.

Referring more particularly to the drawings, 1 indicates the ordinary spring tooth of a harrow and 2 the blade which is formed Fig.

in this instance with cutting edges 3 and 3 at opposite ends thereof.

A clamping means is provided substantially midway between the cutting edges and comprises in this instance, two rearwardly extending arms 4 preferably formed integrally with the blade body, the latter being notched at 5 on opposite sides of the arms to increase the resiliency of the arms. The arms are connected preferably by a bolt 6 having a head 7 at one end and a nut 8 adjustably secured on the other end. The tooth 1 cooperates with the rear face of the blade and lies underneath the bolt 6 so that I specification of LettersI-atent;

Application filed October 29, 1919. '1 Serial Non 834,228

the; e es' may a sagas at opposite faces ofthe clamping-j 3.111184, the

bolt being used for tightly drawing the. arms against the opposite edges of the blade. A clamping means constructed in accordance with the foregoing permits the blade tobe firmly engaged with the tooth without penevided on its rear face and on'opposite sides of the clamping means with abutments 9 wlth whlch the extreme end 10 of the tooth 1 is adapted to cooperate. In this instance,

these abutments are formed by cutting the metal of the blade and rolling the same rearwardly, extensions 11 being preferably provided and extended inwardly over the rear face of the blade in order to provide a pocket in which the end of the harrow tooth may be received.

From the foregoing it will be seen that there has been provided a novel clamping means by which a blade may be effectively secured; to a harrow tooth, said clamping means permltting either end of the blade to be used. In connection with this clamping means, abutments are provided on opposite sides thereof with which the free end of the harrow tooth may cooperate for the pur- V pose of removing the strain from the clamp- 1ng means.

-WhatI claim as, my invention and desire to secure by Letters Patent is:

1. A harrow tooth blade comprising a blade body formed from flat stock and having a pair of rearwardly extending clamping arms, a bolt connecting said arms to draw'them in firm engagement with the harrow tooth andmeans on theblade body for interlocking with the, free end of the harrow tooth.

2. A harrow tooth blade comprising a blade body formed from flat stock and having a pair of integral rearwardly extending clamping arms, the blade body being cut on opposite sides of the arms to give resiliency to the arms, and a bolt connecting said arms to draw themfin firm engagementwith the harrow tooth.

3. A harrow tooth blade comprising a blade body formed from'flat stock and having abutments on the rear face thereof at opposite edges for engagement with the free edge of the harrow tooth, and means for clamping the blade to a harrow tooth with the latter in engagement with the abutment.

4. A reversible harrow tooth blade comprising a body formed from fiat stock and having cutting edges at opposite ends, clamping means arranged-substantially midway between the cutting edges to clamp the blade to a harrow tooth, and abutments arranged in two pairs'on the rear face of the blade and on oppositesides of theclamping means for engagement'with the free end of a harrow tooth. 7 r

5. A harrow tooth blade comprising 2.

-' blade body, clamping-means for clamping the blade to a tooth, and an abutment for wardly to provide a pocket in which the free end of the harrow tooth'is received. v

- JULIAN n. SHEFFIEL 

